from bs4 import BeautifulSoup

html_doc = """<html><head><title>The Dormouse's story</title></head> 
<body> 
<p class="title"><b>The Dormouse's story</b></p> 
<p class="story">Once upon a time there were three little sisters; 
and their names were 
<a href="http://example.com/elsie" class="sister" id="link1">Elsie</a>, 
<a href="http://example.com/lacie" class="sister" id="link2">Lacie</a> and 
<a href="http://example.com/tillie" class="sister" id="link3">Tillie</a>; 
 and they lived at the bottom of a well.</p> 
 <p class="story">...</p> 
 """

soup = BeautifulSoup(html_doc, features='lxml')
print(soup.prettify())